Error in downloading

hydrospring[CodePlex]
I am getting errors in downloading the data, when I am downloading the same data twice in Hydrodesktop. In first attempt it worked well but when I do it again it returns error. log file is attached. Please help me out.

Start by reproducing the failure in HydroDesktop by downloading the same data twice, then inspect the attached log to identify where the second download fails. No source file or test is named in the issue, so the relevant download entry point and regression-test location must be traced from the application. Done means the repeated download completes without the reported error.

Written by the indexing model from the issue text.